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siniylev [52]
3 years ago
5

Find the total area round to the nearest 10th if necessary use the pi symbol on calculator

Mathematics
1 answer:
Anika [276]3 years ago
3 0

Answer:

Total \:area\approx 290.5\: ft^2

Step-by-step explanation:

Total area =\frac {1}{2} \pi r_1^2 +\frac {1}{2} \pi r_2^2

(where r_1 = 22/2 = 11 \: ft, \: \:\:r_2 = (30-22)/2 = 4 \: ft)

\therefore Total \:area=\frac {1}{2} \pi( r_1^2 +  r_2^2)

\therefore Total \:area=\frac {1}{2} \times 3.14(11^2 + 8^2)

\therefore Total \:area=1.57(121 + 64)

\therefore Total \:area=1.57(185)

\therefore Total \:area=290.45\: ft^2

\therefore Total \:area\approx 290.5\: ft^2

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3 years ago
Samantha sends her son, Barry, to a preschool center on certain days. The cost of preschool is $45 per day along with a fixed mo
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Answer:

<h3><em>D. 880 = 45d + 70; 18 days.</em></h3>

Step-by-step explanation:

We are given fixed monthly charge = $70.

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Total cost of d days = cost per day × number of days + fixed monthly charge.

Therefore, we get equation

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<h3>880 = 45d +70.</h3>

Now, we need to solve the equation for d.

Subtracting 70 from both sides, we get

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Dividing both sides by 45, we get

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